Centrifugal pump



F. H. GOOSMANN. CENTRIFUGAL `PUMP. APPLICATION FILED IIAII. 2o. Iszo.

Patented Mar. 28, 192K 2 SHEETS-SHEET F. H. GOOSMANN. CENTRIFUGAL PUMP. APPLICATION FILED IIAII. 2o, 1920.

1,410,564. muted Mar. 28,1922.

2 SHEETS-SHEET 2- f mit i, fie fait;

FRED H. GOOSMANN, OF CINCINNATI, OHIO.

CENTRIFUGAL PUMP.

Specification of Letters Patent.

'lfatented Mar. 28, 1922.

Application filed March 20, 1920. Serial No; 367,518.

To uit lw /Lo'mt my concern.:

Be it Vknown that l, FRED H. GoosMANN, a citizen of the United States, and residing at Cincinnati` in the 'county of Hamilton and State of Chio, 'have invented a new and useful Improvement in Centrifugal Pumps, of which the following specification is a full disclosure.

My invention relates to a. centrifugal liquid pumping apparatuaprimarily adapted for supplying a liquid coolant to the cutting tools of machine tools, elevating the coolant from a reservoir at the base ofthe machine and delivering it in a heavy, uniform, nonsplashing flow to vthe tool. The coolant after being delivered for redelivery, carrying with it cuttings-and grit or sediment, which in degrees are taken up by the pump, varying according to the capacity of the reservoir or a long, continuous pumping period, which does not give the sediment time to settle in the reservoir, and unless passed unobstructedly through the pump, will collect to clog the pump. l/Vater, in a large percentage, is the base of the coolant generally used, although it is sometimes desirable to use a heavy or viscous cutting oil or lubricant. Therefore, the pump must be adapted to serve eiilciently with different kinds of iuids.

The pump usually being in driven connection with the machine, is started and` stopped with the control of the machine it is essential that the pump does not lose it prime during each idle interval or rest period.

To full the foregoing requirements, my invention.contemplates and has for its objects a centrifugal pump, simple and'substantial in construction, with few members or working parts, etlicient in operation and which may be manufactured at a small cX- pense. f

A device eliminating the use of valves and .tine mesh strainers, as any foreign substance entering the intake 'openingwill pass through the pump and not clog the impeller.-

A suction intake and discharge outlet at relatively different elevations and both above the priming well. transmitting a constant prime when stopping' or reversing the motion of the impeller. rllhe impeller has ample clearance. and in its conjunction with a large horizontal. volute. clogging is entirely prevented.

An impeller sustained as a floating member free from the walls of the pump casing.

No bearing'inside of the pump body to he ruined by the grit in the coolant. i

The driving mechanism as a unit mounted upon the pump body and adjustable iu a similar capacity for various installation re quirements.

The drive gears are entirely separated fromv the impeller casing and are enclosed in an oil bath providing splashluhrication for the said gears. y

My pump is composed essentially of four castings, two drive shafts, two intermeshing gears and the necessary fastening and packing elements.

Following is a description, in detail, of the construction and operation of my apparatus, like numerals referring to correspending parts throughout the drawings hereunto annexed. said drawings forming/a part of my specification. in'which: i

Figure l is a general perspective view of my liquid pumping apparatus.

Figure 2 is a vertical" sectional view of the same. taken centrally through the suction intake, impeller and gear casings.

Figure 3 is a top plan view of my liquid pumping apparatus.

Figure et is a side elevation of tho impcller anda portion of its shaft.

Figure 5 is a top plan view of the impeller.

.Figure 6 is aA bottom plan view ofthe saine.

Figure 7 is a horizontal sectional viow of the impeller casing, and of the volute and discharge openingitaken on line if?. Fig. 2.

Figure S is a bottom plan view of the removable top gear casing.

Figure 9 Visa top plan view of the oil reservoir and gear casing. showing in dot and dash lines the position of the right angle spiral drive gear. its shaft and pulley.

Figure l0 is a fragmentary bottom plan of the oil reservoir and gear casing. showing'the arrangement of the depending lip surrounding the intake opening at one of its sides.

Figures l1 and l2 are diagrammatic plan views showing the manner in which the gear casings may be angularly adjusted at angles of 45o, or multiples thereof, to meet any conditions of use.

Referring to thedraivings. l designates the pump casing or body of cylindrical form,

provided with a substantially spherical bottom portion 2. The body interiorly and at its intermediate portion has a horizontal volute or convolute channel al terminating to a tangent discharge opening 5 co-exten sive and horizontally aligned with the volute 4f, the saine beinginteriorly threaded at Nl'or the connection or' suitable discharge pipe T, see Figs. 11 and 12. The cylindrical casing. or body 1 has an open upper end bored and 'faced to receive the closure member 8 as a part ot the impeller and transmission casing secured by screws 9 to the casing l.

Tit-hin. the casing l is placed an impeller 10 of cr construction. having spiral vertical blades 11 depending or extending from a horizontal annular ring portion 12, in tegral with the said spiral blades, and a central' shalt receiving socket 13 connecting with the inner edges of the blades for the reception of the vertical impeller Vshalt 14.

A gear casing and oil reservoir is shown as of two-part construction, one part 15 is substantially of rectangular form, having side Walls 16, a curved end Wall 1T, and the opposite end Wall is formed kwith a suction intake opening and passage 18, communicating with the impeller casing 1, and delivering the liquid supply downwardly to the impeller 10, through the opening 12', of the ring portion 12, of the said. impeller. The lower portion ot the easing is provided with a disk-like flange 8, drilled to receive the screws 9, the screws engaging openings 9 of the impeller casing 1.

Thus the ilange provides a closure for the impeller casing and may be svvivelled for angular adjustment oi the gear casing with respect to the impeller casing for changing the angle and location ot the pulley to meet the various installation requirements and to make a convenient driving connection.

Thesaid easing` 15 is further provided with semi-circular, horizontal, shaft-receiving bearings 19, ilor the reception of a shaft 20, the said shaft being provided with a. drive pulley 21, or With a drive gear, (not shown). Y'

The shaft 2O is also provided at its midportion with a rigidly-attached; rightangled, spiral gear 22 in -mesh with a smaller, similar gear 23 keyed to the impeller shaft 14. .Shaft 1/1, belenr the gear 23, is mounted for rotation in a bush-bearing and stutiing box gland 25. The upper end 26, ot the sha'litilll, is machined to a reduced diameterto receive the gear 23 and provide a shoulder 27 against which the gear rests. The gland and bearing sleeve 25 sockets into a stalling boxv bore formed in the hub portion 25. of the casing 1F, to provide a seal against lthe fluid from the impeller chamber escapingl into the transmission casing` and also to prevent the oil in the gear casings escaping into the pump chamber. rlhe shaft and stulling-box, located above the pump chamber and extending in a vertical plane, is an additional precautionary measure Vagainst fluid leakage into the transmission chamber. f-, spacingk thiinble or journal-bush 26 surrouinils the reduced extension 2G, of the impeller shaft 14;, its lower end rests upon the gear 23 and projects through the bearing bore in the cover casing Bel, the upper end of the thirnble engages the lovverV surface of a hangendislr or Washer 29. llaid billiger-disk 29, a similar disk 30, nut 31 and the upper surface 82, of the cast and bored portionll, of the upper cover 31, coact to torni an adjustable suspending means for the impeller shaft 14C and its coa nected parts. It ivill be apparent that slight vertical adjustments ot the saidV shaft 14 may be readily made.

The upper cover 311, in addition to the cast and bored portion 33, is provided with a hollowv arcuate portion 35, the purpose of which is to receive and enclose the gear 22 and to forni an oil case for said gear.

The cover 34 is further provided With semi; circular, horizontal, shaft-receiving bearings 36, ivhichbearings coact with' the bearings 19 to receive the shaft 20.

The cover 34 is also provided With centering pins 37, Which enga-ge the openings 38, et the gear casing and oil reservoir 15, to enable the cover 34 to be easily'adjusted to position. lllhen the cover has been so adjusted, clamping screws 39 are applied to firmly secure the same. The cover 34:, at opposite sides 'of the hub bearing for the shatt` 14, is provided With openings 40, aligned over the fastening screw of the gland 25, rendering access to the screw with ascreu' driver inserted through said opening, for tightening the gland When occasion requires.

ln the operation of my liquid pumping apparatus, suitable power isapplied to the lpulley 21, and through shaftV 20, @ears 22,

23, and shaft 1li, rotary motion is" imparted to the impeller 10. The liquid to be pumped enters at the intake 18, and is delivered downwardly throughl the opening 12', of ring 12, ol' impeller 10. to spiral blades ll, the said blades discharging the liquid through the discharge opening 5.

The iinpeller casing represents a bowl-like structure'providing a lower vrell or basin portion tor holding a priming charge ot liquid-Withthe Wall ot the casing interiorly abovethev Well' portion annularlv recessed to -iiorin a volute ,channel developing into a disrharge port or passage having its*l axis in a line tangent to the innerv circumferential sur'lace of the casing. A

The inlet passage is located at a higher elevation than the outlet passage, and(there tore, both the inlet and outlet are-disposed iso at an elevation non-draining to the well, so that a priming' charge is constantly maintained in the well and cannot be discharged by any reverse impeller rotation. This is quite a factor when the pump is used` tor supplying a coolant to the cutting tool ot a machine tool, as the pump can be installed in positive driving connection with the driving mechanism for rot-ating or feeding; the work or cutting' tool, as the case may be. ot the machine tool, without the interposition ot' the clutch mechanism for pump control upon each reverse of the driving mechanism 't the machine tool. T he pump is always ready tor duty to supply the coolant when the impcller is rotated in. the appropriate pumping direction and does not discharge the prime through the suction opening when the in'ipeller rotation is reversed.

The base :things 8 ol? the transmission casj which also provides a `cover ttor the .p body the inlet port it is provided with a segmental dangle 50 extending around a portion otl said port. providing' a Iguard or baiiie, at the mouth oi" the inlet passage,` to break the whirling. velocity ot the liquid within the pump upon the reverse rotation ot' the impeller and thereby prevent any risingl or elevating` tendency ot the liquid upwardly through the inlet passage, which would expel the priming charge ot liquid from the well; the 'flange detlecting t-he Vliquid downwardly into the. well, trappingthe same disrharge through the inlet passage.

The impeller depends into the well or basin, and its blades are tree from Contact with the wall oi" the casing, insuring' a full pumping eiiiciency regardless oi' chips or dirt that mayv be present in the coolant. The space between the wall ot the casing and the blades of' the impeller provide a sut'- ficient clearance to prevent the chips or dirt clogging; between the iinpeller blades and the easing wall. therefore the impeller is suspended within the casing; as a iree floa-t ing member, having no rubbing` or bearing Contact with any part ot the pump body, which may impede the rotation ot' the impeller or cause any wear between the parts.

The transmission mechanism 'for the iinpeller is housed within its own Casin which provides a closure cap 'for the well and impellcr shatt, extendingY in a vertical plane through a stuffing-bor; in the cap or base portion ot the transmission casing, preventingl leakage between the well and transmission casing. Thus the oil in the transmission casing' is confined in the casing and no grit or liquid can be conveyed from the .impeller web into the transmission casings. lilith the impeller shaft having its bearing in the transmission casina' above the pump body, the number openings into the pump body are reduced, and, therefore, reducing C Ver lthe opportunities for leakage, and enabling operative relation to a horizontally arrangedV channel ot volute form recessed in the interior oiE said casing, and means for rotating said impeller.

2. ln a liquid vpumping :,ipparatiis, the

coinbination ol a casing, a verticali;T suspc 'i l impeller within said casing, said having' :i horiziintal channel of voluto iorm arranged in operative relation to impeller, an inlet opening* arranged above the iinpeller. a discharge opening` arranged below said inlet opening, and coextensive with said horizontal channel, means for rotating` said impeller, and provision i'or changing' the angularit-y of' the rotating means.

, 3. n apumping` apparatus, a pump casing o1Q bowl-like structure,having a volute channel recessed within its upper, inner surface, a closure member tor said casing', a shaft engaged through said closure member and projecting` into said pump casing, and an impeller Alined upon said shaft and dependiup,v into said casing. n 4:. in a pumping` apparatus, apinnp casing, an impeller within the casing, a transmission casing secured to and providing a closure tor the pump casino', and a shaft iournaled within said transmission casing and exteiuling;` into the pump casing :tor dependingly supporting said impeller mounted thereonr` and transmission means with said transmission casingy tor rotating said shalt. n a puniping apparatus, a pump casingr oit bowl-like str cture, having a volute channel recessed within its upper, inner surtaee. and providing; a well. below said channels Vfor holding` a priming charge of liruiid` a closure member tor said casing, and an impcller rotatably7 suspended it'rom said closure memberA and dependingly into said casina.

in a pumping apparatus, a pump casing;` of bowl-like structure, providing a well 'For receiving an impeller and for holding a priming charge ot liquid and having a discharge port at an elevation above the well portion, a closure member for said casing; and an iinpeller rotatably suspended tro-in saidrlosure member and dependingly into the well portion of said casing.

ingl

T. Vln a pumping apparatus, a pump casing! ot' bowl-like structure, providing a Well for reeeivinp` an impeller and t'or holding a primingl cliaro'e ot liquid and having a discliar port at au elevation above the well portion. a closure member for said oasing. an iinpeller rotatabl'iY suspended from said closure member and depeudingly into tlie Well portion ot said casing, said impeller being;v subslantialhY tree from contact with the wall ot said casing.

8. ln a pumping` apparatus, a pump 'asot bowl-like structure7 a closure member 'Ior said casing, and an impeller rol talablyv suspended from said closure mem- Vinl ot boul-like structure, having a volute cbannncl recessed Within its inner surface and terminating into a discharge passage,

liavinpi an axis tangent to the inner surface ol: the casing7 a closure member fors-aid casing, having` an inlet passage leading' into said casing, an iiupeller rotatably suspended from said closure member and dependingly into said casing.

ll. in a prunpiug apparatus, a pumpcasing' ot bowl-like struc-ture, having a suitable discharge outlet and iinpeller rotatably suspended `Within said casing` a closure inember tor said casing7 lia-ving an inlet passage leading' into said casing. a segmental baille surrounding a portion oit tbn end ot said inlet passage Within said cliainber to prevent the impeller 'forcing` liquid 'from said chamber tbrougli said inlet pas.k gc during tbc reverse impeller rotation.

l2. ln a pumping apparatiiis, an open top pump casing, a transmission casing, providing a closure ttor said pump casing and secure thereon to adjustable position7 an inipeller rotatably suspended trom said transf mission easing dependinglf,7 into said pump casing, and transmission means Within said transmission casing for rotating' said impcller.

In Witness ivliereoi,l hereunto subscribe my name, as attested by the tivo subscribing Witnesses. Y o

FRED ll. GUSMANN. 1il'itnesses L. A. BECK, BnnNion llliLLAR. 

